Diagnosis Procedure
WARNING: This page is about a different car, the 2016 Infiniti Q50. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK FUSE
- Turn ignition switch OFF.
- Check that the following fuse is not blown (open).
Power source Fuse No. Capacity Battery #7 15 A Ignition switch ACC #1 10 A Ignition switch ON #14 5 A
Is the fuse blown (open) ?
YES
Replace fuse after repairing the applicable circuit.
NO
GO TO STEP 2 .
- CHECK DISPLAY CONTROL UNIT BATTERY POWER SUPPLY
- Turn ignition switch OFF.
- Disconnect display control unit harness connector.
- Check the voltage between display control unit harness connector and ground.
(+) (-) Voltage
(Approx.)Display control unit Connector Terminal M100 34 Ground Battery voltage
Is the inspection result normal?
YES
GO TO STEP 3 .
NO
Perform trouble diagnosis for battery power supply circuit.
- CHECK DISPLAY CONTROL UNIT ACCESSORY POWER SUPPLY
- Turn ignition switch ON.
- Check the voltage between display control unit harness connector and ground.
(+) (-) Voltage
(Approx.)Display control unit Connector Terminal M100 33 Ground Battery voltage
Is the inspection result normal?
YES
GO TO STEP 4 .
NO
Perform trouble diagnosis for accessory power supply circuit.
- CHECK DISPLAY CONTROL UNIT IGNITION POWER SUPPLY
Check the voltage between display control unit harness connector and ground.
(+) (-) Voltage
(Approx.)Display control unit Connector Terminal M100 30 Ground Battery voltage Is the inspection result normal?
YES
GO TO STEP 5 .
NO
Perform trouble diagnosis of ignition power supply circuit.
- CHECK GROUND CIRCUIT
- Turn ignition switch OFF.
- Check the continuity between display control unit and ground.
(+) (-) Continuity Display control unit Connector Terminal M100 22 Ground Existed
Is the inspection result normal?
YES
INSPECTION END
NO
Repair or replace malfunctioning parts.